Research on Polar-OTFS Technology in High-Speed Mobile Communication Scenarios

At present, the problem of highly reliable communication in high-speed movement scenarios such as high-speed trains, civil airplanes and satellite communication has not been effectively solved, but has attracted widespread attention. The large Doppler shift caused by the high-speed movement of communication terminals leads to a sharp decrease in performance, and the reliability of information transmission is reduced by factors such as interference and multipath. In order to enhance the performance of communication transmission in high-speed mobile scenarios, this paper adopts the Polar-OTFS coding and modulation scheme. Among them, Polar code is used in 5G systems with its excellent performance, while OTFS modulation technique can provide powerful performance in large Doppler shift. In this paper, Polar codes are combined with OTFS, and by comparing the simulation results with the Polar-OFDM coding and modulation scheme, Polar-OTFS outperforms Polar-OFDM for different transceiver antenna numbers and different constellation mapping methods at a speed of 500 km/h.